<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary" @click="addRole">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表 -->
      <el-table :data="rolelist" style="width: 100%" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="6">
                <el-tag closable @close="removeRightById(scope.row, item1.id)"> {{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="18">
                <!-- 通过for 循坏  嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" :gutter="10" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <!-- 二级 -->
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- !-- 作用域插槽的形式自定义输出格式    用scope接收所有数据 -->
          -->
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="editRole(scope.row)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="delteRole(scope.row)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible"  width="50%" @close="addRoleDialogClose">
      <el-form :model="addForm" :rules="FormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

        <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" @close="editRoleDialogClose" :visible.sync="editRoleDialogVisible" width="40%">
      <el-form :model="editForm" :rules="FormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

      <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRIghts">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 保存添加角色时的信息
      addForm: {
        roleName: '',
        roleDesc: '',
      },
      // 添加角色和编辑角色的验证规则
      FormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }],
      },
      // 控制添加角色对话框的显示与隐藏
      addRoleDialogVisible: false,
      // 控制编辑角色对话框的显示与隐藏
      editRoleDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
            // 树节点默认选中的id节点数组
      activeKeys:[],
      // 默认选中的节点Id 值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId: '',
            // 保存编辑角色时的信息
      editForm:{}
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      // console.log(this.rolelist);
    },
    // 监听添加角色按钮的点击事件
    addRole() {
      this.addRoleDialogVisible = true
    },
    // 编辑角色按钮
    async editRole(roleInfo) {
      const { data: res } = await this.$http.get('roles/' + roleInfo.id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.editForm = res.data
      this.editRoleDialogVisible = true
    },
    // 分配权限角色按钮
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      console.log(this.rightslist);
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 根据ID 删除对应的权限 三级权限
    async removeRightById(role, rightId) {
      //弹框提示客户是否需要删除提示
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      }).catch(err => err)
      //catch(err => err) 捕获用户的取消行为
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // this.getRolesList()
      // 重新赋值 把服务器返回的最新权限，直接返回children属性
      role.children = res.data
    },
    // 通过递归的形式，获取角色下所有三级权限的id,并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node 节点不包含children 属性，则是三级节点
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
      this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRIghts(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },

    // 确定添加角色按钮的点击事件
    addRoleInfo(){
      this.$refs.addFormRef.validate(async (valid,field)=>{
        // 未验证通过
        if(!valid){
          let arr = Object.keys(field)
          return this.$message.error('获取失败！')
        }

        const {data:res} = await this.$http.post('roles',this.addForm)
        // 添加失败
        if (res.meta.status !== 201) {
          return this.$message.error('添加失败！');
        }

        this.$message.success('添加角色成功！')
        this.getRolesList()
        this.addRoleDialogVisible = false
      })
    },
    // 添加用户对话框关闭时清空验证规则和数据
    addRoleDialogClose(){
      this.$refs.addFormRef.resetFields()
    },
    // 确认编辑角色信息
    async editRoleInfo(){
      this.$refs.editFormRef.validate(async (valid,field)=>{
        // 未验证通过
        if(!valid){
          let arr = Object.keys(field)
          return this.$message.error('获取失败！')
        }

        const {data:res} = await this.$http.put('roles/'+this.editForm.roleId,this.editForm)
        // 编辑失败
        if (res.meta.status !== 200) {
          return this.$message.error('获取失败！');
        }

        this.$message.success('编辑角色信息成功!')
        this.editRoleDialogVisible = false
        this.getRolesList()
      })
    },
    // 编辑角色对话框关闭
    editRoleDialogClose(){
      this.$refs.editFormRef.resetFields()
    },
    // 根据角色id删除角色
    async delteRole(roleInfo){
      console.log(roleInfo);
      // cancel confirm
      const result = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(reason => reason)

      // 取消删除
      if(result === 'cancel'){
        return this.$message('已取消删除')
      }

      const {data:res} = await this.$http.delete('roles/'+roleInfo.id)
      // 删除失败
      if (res.meta.status !== 200) {
        return this.$message.error('操作失败');
      }

      this.$message.success('删除角色成功！')
      this.getRolesList()
    }

  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
